Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Atomization and Sprays
Импакт фактор: 1.262 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

Том 29, 2019 Том 28, 2018 Том 27, 2017 Том 26, 2016 Том 25, 2015 Том 24, 2014 Том 23, 2013 Том 22, 2012 Том 21, 2011 Том 20, 2010 Том 19, 2009 Том 18, 2008 Том 17, 2007 Том 16, 2006 Том 15, 2005 Том 14, 2004 Том 13, 2003 Том 12, 2002 Том 11, 2001 Том 10, 2000 Том 9, 1999 Том 8, 1998 Том 7, 1997 Том 6, 1996 Том 5, 1995 Том 4, 1994 Том 3, 1993 Том 2, 1992 Том 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2013007395
pages 1049-1078


Xiaoyi Li
United Technologies Research Center, 411 Silver Lane, East Hartford, Connecticut 06108, USA
Marios Soteriou
United Technologies Research Center, 411 Silver Lane, East Hartford, Connecticut 06108, USA

Краткое описание

Fuel injectors relevant to aerospace combustors exploit geometrical complexity to generate the aerodynamic forces that atomize the fuel and achieve the fuel-air mixing that enhances the combustion process. Detailed experimental analysis of the multiphase flow occurring in these injectors remains a challenge due to the extreme operating conditions, the geometrical complexity, and the challenges posed by dense spray measurements. High-fidelity, first-principles simulation offers an alternative analysis approach. Thus far, such simulations have been restricted to canonical problems with benign operating conditions. In this work, we present and apply a numerical framework that enables the simulation of a realistic multinozzle/swirler injector. This framework leverages the coupled level set and volume-of-fluid methodology for capturing the liquid−gas surface, the ghost fluid algorithm for reproducing the surface discontinuity, adaptive mesh refinement for efficiently resolving the surface features, Lagrangian droplet models for treating the smallest droplets, and an embedded boundary algorithm to flexibly handle the geometry. Optimization of this framework on massively parallel systems is discussed and so is its validation using the canonical problems of impinging liquid jets and liquid jet in crossflow. Results from the realistic injector simulations are presented, with emphasis on demonstrating the validity and feasibility of the approach via comparisons with experimental evidence. Moreover, it is shown that for the conditions simulated, the liquid jet atomization inside the swirling flow approximates that of a liquid jet in plain crossflow and that filming on the injector walls is minimal. Comparisons against coarse grid simulations indicate that in the latter case the flow fine scale features are compromised but jet penetration and breakup location are not.